feat(docs): Add getting-started with installation (#3557)

* Add getting-started with installation

* Add minimal example, and helpers and desired proprieties explanation

* Add comment on helper example usage

* fix small grammar error

* Fix GuildMessages being without the Intents. before

Co-authored-by: Awesome Stickz <awesome@stickz.dev>

* Apply code suggestion

Co-authored-by: Awesome Stickz <awesome@stickz.dev>

* Apply suggestions from code review

Co-authored-by: Awesome Stickz <awesome@stickz.dev>

* fix: typo

* remove todo

* Apply suggestions from code review

Co-authored-by: LTS20050703 <lts20050703@gmail.com>

* Remove useless parenthesis

* Apply code review suggestion

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Co-authored-by: Awesome Stickz <awesome@stickz.dev>
Co-authored-by: LTS20050703 <lts20050703@gmail.com>

website/docs/examples/deno.md

@@ -11,10 +11,10 @@ Discordeno supports Deno by using the npm: specifier for your import.
 
 Before, going forward, please make sure to have finished everything on this list.
 
-- Create an application and get the bot token. [Create Application Guide](https://discordeno.js.org/docs/beginner/token)
-- Add your bot to a server you own. [Invite Bot Guide](https://discordeno.js.org/docs/beginner/inviting)
-- Install Discordeno. [Installation Guide](https://discordeno.js.org)
-- Setup environment variables. [Environment Variables Guide](https://discordeno.js.org/docs/beginner/env)
+- Create an application and get the bot token. [Create Application Guide](../beginner/token)
+- Add your bot to a server you own. [Invite Bot Guide](../beginner/inviting)
+- Install Discordeno. [Installation Guide](../getting-started.md)
+- Setup environment variables. [Environment Variables Guide](../beginner/env)
 
 This is how you can use it to create a bot that logs into discord: